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643 WILLIAM Street, Key West, FL 33040

Single family property built in 1938 with 2,122 sq ft of living area on a 0.16-acre lot in Key West, Monroe County. Facts below come from the county property appraiser's public record.

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County just value (tax roll) — not a market value
$2,888,154
County assessed value (tax roll)
$2,888,154
Living area
2,122 sq ft
Lot size
0.16 acres (7,091 sq ft)
Year built
1938
Land use
Single family
FEMA flood zone
Not on file yet
County
Monroe County, FL
Parcel ID
fl-54-0668 25 00018550000000

At a glance

Who owns 643 WILLIAM St?
Monroe County property records list HESSE ROBERT as the owner of record.
What is the county just value of 643 WILLIAM St?
$2,888,154 on the Monroe County tax roll (as of January 1). Just value is the property appraiser's figure for property taxes — not a market value.
What is the parcel ID?
fl-54-0668 25 00018550000000 (Monroe County).

Current owner

Owner contact info

Phones, emails and mailing addresses from public Florida records are available to members.

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More on William St

All 133 properties on William St · ZIP 33040 (Key West). Values are county just values (tax roll), not market values.

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Source: Florida Department of Revenue parcel roll; data refreshed Jun 25, 2026. Values are county tax-roll figures, not appraisals. How to read these values · Data sources